CN105318536B - A kind of single drum horizontal formula reciprocal grate sprays denitration corner tube boiler - Google Patents

A kind of single drum horizontal formula reciprocal grate sprays denitration corner tube boiler Download PDF

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Publication number
CN105318536B
CN105318536B CN201410378220.8A CN201410378220A CN105318536B CN 105318536 B CN105318536 B CN 105318536B CN 201410378220 A CN201410378220 A CN 201410378220A CN 105318536 B CN105318536 B CN 105318536B
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water
boiler
denitration
cooling
arch
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CN105318536A (en
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李琳
赵光奎
钟照青
胡翠华
孙伟东
张显辉
楚光临
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HARBIN SIFANG BOILER Co Ltd
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HARBIN SIFANG BOILER Co Ltd
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Abstract

The present invention relates to a kind of single drum horizontal formula reciprocal grate to spray denitration corner tube boiler, including boiler furnace and reciprocal grate part, wherein, reciprocal grate part is arranged on the bottom of boiler furnace part, it is characterized in that:In boiler body(1)One boiler water cycle mechanism of upper setting, it is by passage rear wall water-cooling wall(30)With expansion chamber upper collecting chamber(18), lower header(33)Composition, in boiler body(1)Upper to set spray denitration cyclonic separation sedimentation device, it is by denitration spray tube(28), denitration nozzle(24), denitrfying agent feeder(35), upper sedimentation separation room(21), lower sedimentation separation chamber(29)Composition, has the features such as discharge for reducing nitrogen oxides, reduction air pollution, the raising thermal efficiency, energy-saving environmental protection safety.

Description

A kind of single drum horizontal formula reciprocal grate sprays denitration corner tube boiler
Technical field
The present invention relates to boiler technology field, can particularly meet the discharge of national emission standard of air pollutants for boilers It is required that solving discharged nitrous oxides concentration height, a kind of single drum horizontal formula reciprocal grate spray denitration cornue boiler of environment is polluted Stove.
Background technology
It is well known that current corner tube boiler structure is to arrange four down-comers not being heated as branch around boiler body Support.Furnace outlet flue gas directly washes away Flag pattern heat surface coiled pipe, and serious wear, without expansion chamber, dust cannot settle, and is heated Face is few, and service life is low, and maintenance rate is high, increases use cost.As national environmental protection policy is increasingly stringent, known corner tube boiler It cannot meet emission request of the country on emission standard of air pollutants for boilers, discharged nitrous oxides concentration is high, pollutes environment. Therefore, how to solve boiler does not have an expansion chamber and ash fall, and solves that heating surface area is small, and furnace outlet flue gas is not rushed directly Brush Flag pattern heat surface coiled pipe, reduces abrasion, and prolonged boiler service life, reduces maintenance frequency, reduces use cost, in addition, Denitration in Boiler is solved, discharged nitrous oxides, energy conservation and environmental protection etc. is reduced and has become the problem of in the urgent need to address at present.
The content of the invention
The purpose of the present invention is:It is improved for prior art common problem, overcome the deficiencies in the prior art And defect, there is provided one kind carries expansion chamber, reduces the discharge of nitrogen oxides, improves a kind of single drum horizontal formula of boiler thermal efficiency Reciprocal grate sprays denitration corner tube boiler.
The technical solution adopted by the present invention to solve the technical problems is:A kind of single drum horizontal formula reciprocal grate spray is de- Nitre corner tube boiler, including boiler furnace part, reciprocal grate part, boiler furnace part include boiler body 1, boiler body 1 The four side wall down-comers 5 and rear arch feed pipe 27 with supporting role that surrounding vertical is set, in 1 upper left of boiler body The drum 3 that part is set, the water inlet pipe 2 connected with drum 3, Flag pattern heat surface feed pipe 14, face arch down-comer 4, and decline Pipe 26 and last time water pipe 15, side water wall 6, burner hearth 7, face arch water-cooling wall 8, face arch lower header 9, side wall lower header 10, Side water wall upper collecting chamber 16, front and rear arch upper collecting chamber 17, outlet pipe 19, Flag pattern heat surface upper collecting chamber 20, Flag pattern heat surface pipe 22, Exhanst gas outlet 23, Flag pattern heat surface 25, rear arch water-cooling wall 31, Flag pattern heat surface lower header 32, lower header 33, and dust export 34, reciprocal grate part is arranged on the bottom of boiler furnace part and is connected with the boiler body 1 of boiler furnace part, its feature It is:
A, boiler furnace part boiler body 1 rear arch water-cooling wall 31, between Flag pattern heat surface 25 and side water wall 6 One boiler water cycle mechanism is set, it is made of passage rear wall water-cooling wall 30 and expansion chamber upper collecting chamber 18, lower header 33, as Fig. 1- Shown in 5.
B, boiler furnace part boiler body 1 rear arch water-cooling wall 31, the passage rear wall water of boiler water cycle mechanism Spray denitration cyclonic separation sedimentation device is set between cold wall 30 and side water wall 6, it is by denitration spray tube 28, denitration nozzle 24, denitrfying agent feeder 35, upper sedimentation separation room 21, lower sedimentation separation chamber 29 forms, wherein, the uniformly distributed level of denitration spray tube 28 It is arranged on 30 upper interval of passage rear wall water-cooling wall of rear arch water-cooling wall 31 and boiler water cycle mechanism, on denitration spray tube 28 Cloth sets denitration nozzle 24, realizes unidirectional spray denitration sedimentation separation, the bottom of denitration spray tube 28 and denitrfying agent feeder 35 Connection, as shown in Fig. 1,2,5.Here, denitration nozzle 24 can also be uniformly arranged denitration nozzle denitration spray tube 28 is upper and lower 24, realize Bidirectional spray denitration sedimentation separation, as shown in Figure 3,4.In addition, denitration spray tube 28 can be designed as up and down it is multiple rows of, Such as it is two rows of, or three or four rows.
C, the reciprocal grate structure that the design of reciprocal grate portion is set using the low inclined-plane of the high opposite side in side, it is by reciprocal grate 11, expanding stent 12 is slided, boiler supports 13 form, as shown in Figs. 1-5.In addition, this technology is not limited only to reciprocal grate 11 Structure, other fire grate structures, such as traveling-grate stoker structure etc. can also be used.
The passage rear wall water-cooling wall 30 of described boiler water cycle mechanism is designed as co-current contact after cyclone type elder generation adverse current Top indent, lower lobes it is inverted S-shaped, also, passage rear wall water-cooling wall 30 it is upper and lower respectively with expansion chamber upper collecting chamber 18 and next part Case 33 connects, as shown in Figs. 1-5.
The upper sedimentation separation room 21 of described spray denitration cyclonic separation sedimentation device is by rear arch water-cooling wall 31, passage rear wall Partial section is formed in water-cooling wall 30, side water wall 6, and denitration nozzle 24 and denitration spray tube 28, lower sedimentation separation chamber 29 are made of 30 lower part of passage rear wall water-cooling wall and 25 lower part section of Flag pattern heat surface, as shown in Figs. 1-5.
The course of work and principle of this technology be:It is that coal is fallen on reciprocal grate 11 under the effect of gravity, in machinery first Lower be sent into burner hearth 7 of power effect is burnt, and the heat of generation is by the face arch water-cooling wall 8 of burner hearth, rear arch water-cooling wall 31, side wall Water-cooling wall 6 absorbs, the flue gas after cooling behind upper sedimentation separation room 21 on be advanced into sinking drop separation chamber 29, Flag pattern heat surface 25 carry out washing away heat exchange, complete whole heat transfer process, afterwards, are discharged by exhanst gas outlet 23.Here, dust is through lower sedimentation separation chamber Discharged after 29 sedimentations by dust export 34, complete the boiler smoke course of work.Secondly boiler water cycle process is boiler blow-down water Drum 3 is flowed into through water inlet pipe 2, boiler water outlet is flowed out through outlet pipe 19.Specific one is by under drum 3, face arch down-comer 4, face arch Header 9 feeds water, and arch upper collecting chamber 17, last time water pipe 15 return to drum 3 before and after being flowed into after reciprocal grate 11 and burner hearth 7 exchange heat, complete Circulated into 8 water of face arch water-cooling wall;Second, by drum 3, side wall down-comer 5, side wall lower header 10 feed water, through reciprocating furnace Row 11 and burner hearth 7 flow into side water wall upper collecting chamber 16 after exchanging heat, last time water pipe 15 returns to drum 3, completes 6 water of side water wall Circulation;Third, by drum 3, rear arch feed pipe 27, down-comer 26, lower header 33 feed water, after reciprocal grate 11 and burner hearth 7 exchange heat Flow into front and rear arch upper collecting chamber 17, expansion chamber upper collecting chamber 18, last time water pipe 15 and return to drum 3, after completing rear arch water-cooling wall 31, passage 30 water of wall water-cooling wall circulates;Fourth, fed water by drum 3, Flag pattern heat surface feed pipe 14, into Flag pattern heat surface lower header 32, flag Formula heating surface tube 22, Flag pattern heat surface 25, Flag pattern heat surface upper collecting chamber 20, completes the circulation of 25 water of Flag pattern heat surface, by outlet pipe 19 water outlets, complete whole work process.Need to stress is this technology spray denitration cyclonic separation sedimentation device and boiler Water circulation mechanism, the former mainly carries out spray denitration and cyclonic separation sedimentation, exiting flue gas and the institute of denitration nozzle 24 of burner hearth 7 Following current is contacted after the denitrfying agent elder generation adverse current ejected, and expansion chamber 21 is separated in denitration Sproy cyclone, i.e., upper separation expansion chamber 21 and lower sedimentation separation chamber 29 in chemically reacted, complete denitrating flue gas depositing dust separation infall process, reduce nitrogen oxides row Put, energy conservation and environmental protection, this technology spray denitration cyclonic separation sedimentation device can be widely applied on other various boilers.The latter master If carrying out adding one group of boiler water cycle process, i.e., after passage rear wall water-cooling wall 30 is designed as cyclone type elder generation adverse current following current connect Tactile top indent, lower lobes it is inverted S-shaped(Or referred to as arc cyclone structure), it is small to improve heating surface area, furnace outlet Flue gas does not wash away Flag pattern heat surface coiled pipe directly, reduces abrasion, and prolonged boiler service life reduces maintenance frequency, and reduction makes With cost, in addition, this technology is not limited only to the structure of reciprocal grate 11, other fire grate structures, such as chain can also be used Fire grate structure etc..Denitrfying agent is using liquefied ammonia, ammonia, urea liquid in this technology.A kind of single drum horizontal formula of this technology answers stove Fire grate spray denitration corner tube boiler is hot-water boiler, steam boiler etc. or other types of boiler.In addition, this technology It can be widely applied to other various corner tube boilers.
The beneficial effect of this technology compares possessed feature with existing technology in other words:Design spray denitration whirlwind Sedimentation device and boiler water cycle mechanism are separated, the sedimentation separation room equipped with spray denitration and cyclone separating structure, has reduction The features such as discharge of nitrogen oxides, reduces air and dust pollutes, raising boiler thermal efficiency, energy-saving environmental protection safety.
Brief description of the drawings
Fig. 1 is the present invention(Spray 28 top of denitration pipe and denitration nozzle 24 is set, passage rear wall water-cooling wall 30 is in top It is recessed, the inverted S-shaped structure of lower lobes)Front view.
Fig. 2 is second of structure of the invention(Spray 28 top of denitration pipe and denitration nozzle 24, passage rear wall water-cooling wall 30 are set For vertically disposed two passage rear wall water-cooling walls 30 of upper part, it is a passage rear wall water-cooling wall that lower part, which merges connection, 30 structure)Front view.
Fig. 3 is the third structure of the invention(Spray the upper and lower setting denitration nozzle 24 of denitration pipe 28, passage rear wall water-cooling wall 30 be top indent, the inverted S-shaped structure of lower lobes)Front view.
Fig. 4 is the 4th kind of structure of the invention(Spray the upper and lower setting denitration nozzle 24 of denitration pipe 28, passage rear wall water-cooling wall 30 be vertically disposed two passage rear wall water-cooling walls 30 of upper part, and it is a passage rear wall water cooling that lower part, which merges connection, The structure of wall 30)Front view.
Fig. 5 is the 5th kind of structure of the invention(Spray 28 top of denitration pipe and denitration nozzle 24, passage rear wall water-cooling wall 30 are set For top indent, what the inverted S-shaped structure of lower lobes, and 19 outlet pipes were disposed below, pay attention to:Above all set for four kinds Put above)Front view.
In figure:1 boiler body, 2 water inlet pipes, 3 drums, 4 face arch down-comers, 5 side wall down-comers(Or it is known as left side Boiler supports side wall down-comer), 6 side water walls, 7 burner hearths, 8 face arch water-cooling walls, 9 face arch lower headers, 10 side walls Lower header, 11 reciprocal grates, 12 slip expanding stents, 13 boiler supports, 14 Flag pattern heat surface feed pipes, 15 last time water pipes, 16 Side water wall upper collecting chamber, 17 front and rear arch upper collecting chambers, 18 expansion chamber upper collecting chambers, 19 outlet pipes, 20 Flag pattern heat surface upper collecting chambers, 21 Upper sedimentation separation room(Or it is known as spray denitration cyclone settling separation chamber), 22 Flag pattern heat surface pipes, 23 exhanst gas outlets, 24 denitrations Nozzle, 25 Flag pattern heat surfaces, 26 down-comers(Or referred to as rear arch passage rear wall down-comer), 27 rear arch feed pipes(Or it is known as Starboard boiler supports rear arch feed pipe), 28 spray denitration pipes, 29 times sedimentation separation chambers(Or referred to as sedimentation separation room), 30 is logical Road rear wall water-cooling wall, 31 rear arch water-cooling walls, 32 Flag pattern heat surface lower headers, 33 lower headers(Or referred to as rear arch water-cooling wall passage Rear wall lower header), 34 dust exports, 35 denitrfying agent feeders(Or referred to as denitration agent feeding device).
Embodiment
The embodiment of the present invention, as shown in Figs. 1-5, a kind of single drum horizontal formula reciprocal grate spray denitration cornue Boiler, including boiler furnace part, reciprocal grate part, boiler furnace part include boiler body 1, hang down around boiler body 1 Four directly set have the side wall down-comer 5 and rear arch feed pipe 27 of supporting role, set up separately in 1 upper left quarter of boiler body The drum 3 put, the water inlet pipe 2 connected with drum 3, Flag pattern heat surface feed pipe 14, face arch down-comer 4, and 26 He of down-comer Last time water pipe 15, side water wall 6, burner hearth 7, face arch water-cooling wall 8, face arch lower header 9, side wall lower header 10, side wall water Cold wall upper collecting chamber 16, front and rear arch upper collecting chamber 17, outlet pipe 19, Flag pattern heat surface upper collecting chamber 20, Flag pattern heat surface pipe 22, flue gas goes out Mouth 23, Flag pattern heat surface 25, rear arch water-cooling wall 31, Flag pattern heat surface lower header 32, lower header 33, and dust export 34, it is past Multiple fire grate part is arranged on the bottom of boiler furnace part and is connected with the boiler body 1 of boiler furnace part, it is characterised in that:
A, boiler furnace part boiler body 1 rear arch water-cooling wall 31, between Flag pattern heat surface 25 and side water wall 6 One boiler water cycle mechanism is set, it is made of passage rear wall water-cooling wall 30 and expansion chamber upper collecting chamber 18, lower header 33, as Fig. 1- Shown in 5.
B, boiler furnace part boiler body 1 rear arch water-cooling wall 31, the passage rear wall water of boiler water cycle mechanism Spray denitration cyclonic separation sedimentation device is set between cold wall 30 and side water wall 6, it is by denitration spray tube 28, denitration nozzle 24, denitrfying agent feeder 35, upper sedimentation separation room 21, lower sedimentation separation chamber 29 forms, wherein, the uniformly distributed level of denitration spray tube 28 It is arranged on 30 upper interval of passage rear wall water-cooling wall of rear arch water-cooling wall 31 and boiler water cycle mechanism, on denitration spray tube 28 Cloth sets denitration nozzle 24, realizes unidirectional spray denitration sedimentation separation, the bottom of denitration spray tube 28 and denitrfying agent feeder 35 Connection, as shown in Fig. 1,2,5.Here, denitration nozzle 24 can also be uniformly arranged denitration nozzle denitration spray tube 28 is upper and lower 24, realize Bidirectional spray denitration sedimentation separation, as shown in Figure 3,4.In addition, denitration spray tube 28 can be designed as up and down it is multiple rows of, Such as it is two rows of, or three or four rows.
C, the reciprocal grate structure that the design of reciprocal grate part is set using the low inclined-plane of the high opposite side in side, it is by reciprocating furnace Row 11, slides expanding stent 12, and boiler supports 13 form, as shown in Figs. 1-5.In addition, this technology is not limited only to reciprocal grate 11 structure, can also use other fire grate structures, such as traveling-grate stoker structure etc..
The passage rear wall water-cooling wall 30 of described boiler water cycle mechanism is designed as co-current contact after cyclone type elder generation adverse current Top indent, lower lobes it is inverted S-shaped, also, passage rear wall water-cooling wall 30 it is upper and lower respectively with expansion chamber upper collecting chamber 18 and next part Case 33 connects, as shown in Figs. 1-5.
The upper sedimentation separation room 21 of described spray denitration cyclonic separation sedimentation device is by rear arch water-cooling wall 31, passage rear wall Partial section is formed in water-cooling wall 30, side water wall 6, and denitration nozzle 24 and denitration spray tube 28, lower sedimentation separation chamber 29 are made of 30 lower part of passage rear wall water-cooling wall and 25 lower part section of Flag pattern heat surface, as shown in Figs. 1-5.

Claims (3)

1. a kind of single drum horizontal formula reciprocal grate spray denitration corner tube boiler, including boiler furnace part, reciprocal grate part, Boiler furnace part includes boiler body(1), boiler body(1)Four side water coolings with supporting role that surrounding vertical is set Wall down-comer(5)With rear arch feed pipe(27), in boiler body(1)The drum that upper left is set(3), with drum(3)Connection Water inlet pipe(2), Flag pattern heat surface feed pipe(14), face arch down-comer(4), and down-comer(26)With last time water pipe(15), Side water wall(6), burner hearth(7), face arch water-cooling wall(8), face arch lower header(9), side wall lower header(10), side wall water cooling Wall upper collecting chamber(16), front and rear arch upper collecting chamber(17), outlet pipe(19), Flag pattern heat surface upper collecting chamber(20), Flag pattern heat surface pipe (22), exhanst gas outlet(23), Flag pattern heat surface(25), rear arch water-cooling wall(31), Flag pattern heat surface lower header(32), lower header (33), and dust export(34), reciprocal grate part be arranged on the bottom of boiler furnace part and with boiler furnace part Boiler body(1)It is connected, it is characterised in that:
A, in the boiler body of boiler furnace part(1)Rear arch water-cooling wall(31), Flag pattern heat surface(25)And side water wall (6)Between a boiler water cycle mechanism is set, it is by passage rear wall water-cooling wall(30)With expansion chamber upper collecting chamber(18), lower header(33) Composition;
B, in the boiler body of boiler furnace part(1)Rear arch water-cooling wall(31), the passage rear wall water of boiler water cycle mechanism Cold wall(30)And side water wall(6)Between set spray denitration cyclonic separation sedimentation device, it is by denitration spray tube(28), denitration Nozzle(24), denitrfying agent feeder(35), upper sedimentation separation room(21), lower sedimentation separation chamber(29)Composition, wherein, denitration spray Pipe(28)Uniformly it is horizontally set on rear arch water-cooling wall(31)With the passage rear wall water-cooling wall of boiler water cycle mechanism(30)Upper zone Between, denitration spray tube(28)On be uniformly arranged denitration nozzle(24), denitration spray tube(28)Bottom and denitrfying agent feeder (35)Connection;
C, the reciprocal grate structure that the design of reciprocal grate portion is set using the low inclined-plane of the high opposite side in side, it is by reciprocal grate (11), slide expanding stent(12), boiler supports(13)Composition.
A kind of 2. single drum horizontal formula reciprocal grate spray denitration corner tube boiler as claimed in claim 1, it is characterised in that:Institute The passage rear wall water-cooling wall of the boiler water cycle mechanism said(30)The top indent of co-current contact after cyclone type elder generation adverse current is designed as, Inverted S-shaped, also, the passage rear wall water-cooling wall of lower lobes(30)It is upper and lower respectively with expansion chamber upper collecting chamber(18)And lower header (33)Connection.
3. a kind of single drum horizontal formula reciprocal grate spray denitration corner tube boiler as claimed in claim 1 or 2, its feature exist In:The upper sedimentation separation room of described spray denitration cyclonic separation sedimentation device(21)By rear arch water-cooling wall(31), passage rear wall Water-cooling wall(30), side water wall(6), and denitration nozzle(24)With denitration spray tube(28)Upper partial section is formed, and is sunk Separation chamber drops(29)By passage rear wall water-cooling wall(30)Lower part and Flag pattern heat surface(25)Lower part section is formed.
CN201410378220.8A 2014-08-04 2014-08-04 A kind of single drum horizontal formula reciprocal grate sprays denitration corner tube boiler Active CN105318536B (en)

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Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002177740A (en) * 2000-12-15 2002-06-25 Ishikawajima Harima Heavy Ind Co Ltd Denitration apparatus for waste heat recovery boiler
CN100434798C (en) * 2006-07-10 2008-11-19 西安交通大学 Internally circulating fluidized reburning device for fly ash based on high temperature separation
CN200965239Y (en) * 2006-08-02 2007-10-24 周开根 Tunnel firebox and soot-free coal-firing biomass-firing boiler constituted therefor
CN102374658B (en) * 2011-07-27 2013-06-05 西安交通大学 Angular pipe water circulating structure with complete forced upward flowing on heating surface
CN103212284A (en) * 2013-03-15 2013-07-24 孙琦 Method and device for combined removal of nitric oxide and sulfide in flue gas
CN204100568U (en) * 2014-08-04 2015-01-14 哈尔滨四方锅炉有限公司 A kind of single drum horizontal formula reciprocal grate spray denitration corner tube boiler

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